Is the Universe Spherical, Cylindrical, or Something Else?

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Discussion Overview

The discussion centers on the shape of the universe, exploring various theoretical models including spherical and cylindrical forms. Participants also consider implications of general relativity and the Big Bang theory, as well as alternative perspectives on the universe's structure.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that the universe could be roughly spherical or cylindrical based on interpretations of general relativity.
  • One participant suggests that the universe might be static and not necessarily expanding or contracting, likening it to tectonic plates on Earth.
  • Another participant hypothesizes that the singularity from the Big Bang may have evaporated in a spherical manner, while also considering a cylindrical shape due to the unidirectional increase in entropy.
  • A participant expresses skepticism about the Big Bang theory, citing complications and questioning its compatibility with general relativity.
  • One viewpoint argues that the universe does not have a shape, challenging the common visualization of it as a sphere in a higher-dimensional space.
  • Another participant humorously suggests that the universe could be doughnut-shaped, based on the idea of extreme gravity at the center.

Areas of Agreement / Disagreement

Participants express a range of views on the shape of the universe, with no consensus reached. Some support the Big Bang theory while others question its validity and compatibility with general relativity.

Contextual Notes

There are unresolved assumptions regarding the definitions of shape and structure in cosmology, as well as the implications of general relativity on these models. The discussion reflects a variety of interpretations and speculative ideas without definitive conclusions.

Einstiensqd
What is the shape of the universe? Judging by general relativity, the shape of the universe could be roughly spherical, and also roughly cylindrical. Another interesting thing is that the universe actually could be static and un-expanding or contracting.
Imagine the universe like the earth, spherical. Now, imagine the galaxies as tectonic plates. As they go farther away, we can't see their light as well, but in turn, the universe does not need to expand.
 
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When the singularity (from the Big Bang) evaporated, then one can easily hypothesize that it may have evaporated in a spherical manner.

On the other hand, the shape could very well be a cylinderical shape. From the point of the BB, the increase in entropy, aka time, would only be in one direction.
 
I'm not a big fan of the Big Bang. To many complications with it, and what about general relativity in it??!
 
The universe does not have a shape. Many people visualize it as a sphere embedded in a higher-dimensional manifold, but this is not necessary, and is probably misleading.

The Big Bang theory is supported by a vast preponderance of evidence. Currently, there is no other theory compatible with the results of observational cosmology experiments like WMAP.

I have no idea why you think general relativity is incompatible with the Big Bang model, but you're wrong.

- Warren
 
well i know little about this but i would think a sphere because the center of the universe is suposed to have extream gravity or as Homer Simpson siad it oculd be doghnut shaped
 

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